Automobile Industry

Introduction

A multinational group into automotive manufacturing with a total value
of US $14.4 billion and presence in more than 100 countries across the
globe.

Challenge

The authorities at the manufacturing facility were unable to handle the
reject streams originating in their different processes. Government
approvals based on the adherence to discharge standards seemed an
uphill task.

All the waste streams coming out of different parts of the plant were
routed to a common Effluent Treatment Plant. The outlet from the
Effluent Treatment Plant was further processed in Clariflocculators and
flash mixers and a considerable reduction was observed in the BOD,
COD and TSS levels.

Further, to cater to the more difficult task of reducing the fine
suspensions and TDS in the water, an exhaustive membrane based UF –
RO system was laid out with a recovery of almost 92%. Finally, the reject
from the RO system (approx 8%) was fed to the MEE for achieving
almost 100% recovery.

Result Achieved

The treated water is

Flow – 450 cum per day

Colourless and Odourless

Turbidity < 0.1 Nephlometric Turbidity Units

Total Suspended Solids < 0.1 ppm

Total Dissolved Solids < 50 ppm

Benefits to client

Treated water well within the safe disposal limits as
prescribed the pollution control boards

High purity treated water being recycled and reused in
different process systems

Reduction in freshwater intake leading to cost savings

Fully automatic UF – RO system with zero manual intervention

Superior membrane quality leading to lower operating cost of the UF system